Three-dimensional liquid film flow measurement based on digital image projection technology

SONG Huazhen; ZHAO Huanyu; ZHU Chengxiang; WANG Zhengzhi; TIAN Wei; LI Haixing; ZHU Chunling

doi:10.11729/syltlx20200031

Volume 35 Issue 5

Nov. 2021

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Article Navigation > Journal of Experiments in Fluid Mechanics > 2021 > 35(5): 106-114

SONG H Z，ZHAO H Y，ZHU C X，et al. Three-dimensional liquid film flow measurement based on digital image projection technology[J]. Journal of Experiments in Fluid Mechanics, 2021，35（5）：106-114. doi: 10.11729/syltlx20200031

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Three-dimensional liquid film flow measurement based on digital image projection technology

doi: 10.11729/syltlx20200031

1.
College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing　210016, China
2.
School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai　200240, China
3.
Shanghai Aircraft Design & Research Institute, Shanghai　201210, China

Received Date: 2020-03-09
Rev Recd Date: 2020-04-03

Available Online: 2021-11-11

Publish Date: 2021-11-05

Abstract

Abstract

Quantitative measurement of fluid film flow is a necessary means to analyze the heat transfer process of the icing phase change. Digital Image Projection (DIP) based on image processing enables non-invasive quantitative measurement of fluid films. Firstly, the basic principles, cross-correlation algorithm and calibration method of the DIP technology are introduced. Based on this, the DIP system and the flat water film flow test bench are designed and built. Subsequently, the overall error of the DIP system was tested and was found to be within 5%, indicating the reliability and accuracy of the system. A series of water film flow experiments were carried out on a flat water film flow test bench. The DIP system was used to restore the three-dimensional full picture of the flat water film flow. Finally, the relationship between the average water film thickness as well as the dimensionless water film thickness and the water film Reynolds number is obtained by fitting the measurement results, and is compared with the theoretical derivation and literature experimental results. Results show the overall trend is consistent.
- aircraft icing,
- water film,
- non-invasive measurement,
- digital image project technology,
- two-phase flow

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References(22)

References

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